* DEV: Move `Discourse.getURL` and related functions to a module
* DEV: Remove `Discourse.getURL` and `Discourse.getURLWithCDN`
* FIX: `get-url` is required for server side code
* DEV: Deprecate `BaseUri` too.
Co-authored-by: Mark VanLandingham <markvanlan@gmail.com>
Co-authored-by: Robin Ward <robin.ward@gmail.com>
Co-authored-by: Mark VanLandingham <markvanlan@gmail.com>